DB Instance Classes

To learn about the DB engine versions supported by RDS for MariaDB, see DB Engines and Versions.

Table 1 lists the instance classes based on the x86 CPU architecture available to RDS for MariaDB instances using cloud SSDs.

**Table 1** Instance classes
Instance Class	Description	Scenario	Constraints
General-purpose (recommended)	CPU resources are shared with other general-purpose DB instances on the same physical machine. CPU usage is maximized through resource overcommitment. This instance class is a cost-effective option and suitable for scenarios where performance stability is not critical.	Suitable for scenarios that have high requirements on cost-effectiveness.	Only available in the following regions: CN North-Beijing4 and CN North-Ulanqab1 CN East-Shanghai1 CN South-Guangzhou and CN South-Guangzhou-InvitationOnly CN Southwest-Guiyang1 AP-Bangkok and AP-Singapore CN-Hong Kong LA-Sao Paulo1, LA-Santiago, LA-Mexico City1, and LA-Mexico City2 AF-Johannesburg
Dedicated (recommended)	The instance has dedicated CPU and memory resources to ensure stable performance. The performance of a dedicated instance is never affected by other instances on the same physical machine. This instance class is good when performance stability is important.	Suitable for core database scenarios such as e-commerce, gaming, finance, government, and enterprise applications.

**Table 2** Detailed specifications of general-purpose and dedicated instance classes
Instance Class	Specification Code for Primary/Standby Instances	Specification Code for Read Replicas	Specification Code for Single-Node Instances	vCPUs	Memory (GB)
General-purpose	rds.mariadb.n1.large.2.ha	rds.mariadb.n1.large.2.rr	rds.mariadb.n1.large.2	2	4
	rds.mariadb.n1.large.4.ha	rds.mariadb.n1.large.4.rr	rds.mariadb.n1.large.4	2	8
	rds.mariadb.n1.xlarge.2.ha	rds.mariadb.n1.xlarge.2.rr	rds.mariadb.n1.xlarge.2	4	8
	rds.mariadb.n1.xlarge.4.ha	rds.mariadb.n1.xlarge.4.rr	rds.mariadb.n1.xlarge.4	4	16
	rds.mariadb.n1.2xlarge.2.ha	rds.mariadb.n1.2xlarge.2.rr	rds.mariadb.n1.2xlarge.2	8	16
	rds.mariadb.n1.2xlarge.4.ha	rds.mariadb.n1.2xlarge.4.rr	rds.mariadb.n1.2xlarge.4	8	32
Dedicated NOTE: To use the dedicated instance class (vCPU:Memory = 1:2) supported for cloud SSDs, you need to contact customer service to apply for the required permission. The DB instance specifications vary according to site requirements.	rds.mariadb.x1.large.2.ha	rds.mariadb.x1.large.2.rr	rds.mariadb.x1.large.2	2	4
	rds.mariadb.x1.large.4.ha	rds.mariadb.x1.large.4.rr	rds.mariadb.x1.large.4	2	8
	rds.mariadb.x1.large.8.ha	rds.mariadb.x1.large.8.rr	rds.mariadb.x1.large.8	2	16
	rds.mariadb.x1.xlarge.2.ha	rds.mariadb.x1.xlarge.2.rr	rds.mariadb.x1.xlarge.2	4	8
	rds.mariadb.x1.xlarge.4.ha	rds.mariadb.x1.xlarge.4.rr	rds.mariadb.x1.xlarge.4	4	16
	rds.mariadb.x1.xlarge.8.ha	rds.mariadb.x1.xlarge.8.rr	rds.mariadb.x1.xlarge.8	4	32
	rds.mariadb.x1.2xlarge.2.ha	rds.mariadb.x1.2xlarge.2.rr	rds.mariadb.x1.2xlarge.2	8	16
	rds.mariadb.x1.2xlarge.4.ha	rds.mariadb.x1.2xlarge.4.rr	rds.mariadb.x1.2xlarge.4	8	32
	rds.mariadb.x1.2xlarge.8.ha	rds.mariadb.x1.2xlarge.8.rr	rds.mariadb.x1.2xlarge.8	8	64
	rds.mariadb.x1.4xlarge.2.ha	rds.mariadb.x1.4xlarge.2.rr	rds.mariadb.x1.4xlarge.2	16	32
	rds.mariadb.x1.4xlarge.4.ha	rds.mariadb.x1.4xlarge.4.rr	rds.mariadb.x1.4xlarge.4	16	64
	rds.mariadb.x1.4xlarge.8.ha	rds.mariadb.x1.4xlarge.8.rr	rds.mariadb.x1.4xlarge.8	16	128
	rds.mariadb.x1.8xlarge.2.ha	rds.mariadb.x1.8xlarge.2.rr	rds.mariadb.x1.8xlarge.2	32	64
	rds.mariadb.x1.8xlarge.4.ha	rds.mariadb.x1.8xlarge.4.rr	rds.mariadb.x1.8xlarge.4	32	128
	rds.mariadb.x1.8xlarge.8.ha	rds.mariadb.x1.8xlarge.8.rr	rds.mariadb.x1.8xlarge.8	32	256
	rds.mariadb.x1.16xlarge.2.ha	rds.mariadb.x1.16xlarge.2.rr	rds.mariadb.x1.16xlarge.2	64	128
	rds.mariadb.x1.16xlarge.4.ha	rds.mariadb.x1.16xlarge.4.rr	rds.mariadb.x1.16xlarge.4	64	256
	rds.mariadb.x1.16xlarge.8.ha	rds.mariadb.x1.16xlarge.8.rr	rds.mariadb.x1.16xlarge.8	64	512